Quick penetrating subsoiler



M rc 1 4 R. H. FORGY QUICK PENETRATING SUBSOILER 3 Sheets-Sheet 1 Filed June 22, 1950 IN VENTOR ROBERT H. FORGY ATTORNEY March 16, 1954 I GY 2,672,681

QUICK PENETRATING SUBSOILER Filed June 22, 1950 SSheetS-Sheet 2 FIG. 2.

FIG- 6. FIG. 7.

INVENTOR ROBERT H. FQRGY ATTORNEY March 16, 1954 R. H. FORGY 2,672,081

QUICK PENETRATING SUBSOILER Filed June 22, 1950 3 Sheets-Sheet 3 INVENTOR ROBERT H. FORGY Patented Mar. 16, 1954 7 Robert H. Forgy, Centralia, Kans. Application June 22, 1950,- Serial No. 169,587

Claims.

This invention relates to agricultural implements and is more particularly concerned with subsoilers for breaking soil below the ground level. 3 One of the objects of this invention is an im-' plement of the type mentioned which can be. used for very great depths.

, A specific object of the invention is the provision of a subsoiler in which the soil breaking tool is disposed at a favorable angle for quickly penetrating surface trash and root growth as it is lowered into subsoil strata, and means for forcing the tool into a normal operating plane after it has penetrated to a given depth in the soil.

Another object is an implement of the type mentioned in which the depth of operation can be adjusted over a Wide range.

A further object is the provision of means for automatically lifting the soil breaking tool in and out of contact with the ground while the implement is in motion. v v A still further object is the provision of an im-,- plement of the type mentioned in which the frame thereof. remains at a fixed elevation with respect to the ground While the soil breaking tool is moved relative thereto. 1

A still further object is the provision of an forming a draw-yoke to which an adjustable "hitching link IB is attached.

i The frame is normally supported over the ground by means of a pair of ground wheels l9 and 20 carried on stub axles 2| and 22 which are positioned somewhat forward of the transverse center of the frame. The stub-axles are butt welded to removable plates 2 la and 22a which, in turn, are secured by bolts ill to fixed plates 2| b and 22b welded to thesides of the trusses. The bolt holes in the plates are spaced equidistantly,

' such as in the pattern of a square, to permit securing the removable plates in different rotative positions on the fixed plates, The stub shafts are eccentrically mounted relative to the bolt holes, thereby permitting a variation in their vertical and horizontal positioning relative to the frame. 7

The rear cross beam I4 is U-shaped and is removably secured to the trusses by bolts 23 and 24 passing through the outer arms 25 and 2B of the beam or by any other suitable device. By these implement comprising a frame structure with ground supporting means, which means may include ordinary ground wheels, a harrow, a packer, a roller or sheeps foot, etc, a hitching 0on nection-at the front and a unit carrying the sub: soiler tool mounted on the frame by means of a sliding pivot connection and abutment means for limiting the operative position of the unit relative to the frame in combination with means for moving theunit in and out of operative position in relation to the sliding pivot connection. v

Other objects and advantages will appear hereinafter. I Y

In the drawing: Figure l is an isometric view of an embodiment of the invention; f

Figure 2 is a section along the line-2+2 of Figure 1;

Figures 3, and 5 are side elevational views of the same embodiment with the 'sub'soiler tool.

in difierent positions;

Figures 6 and 7 are fragmentary side elevational views of a portion 'o'fthe implement show; ing certain modifications thereof. l

Referring with more particularity to the drawing in which like numerals designate like parts, the embodiment illustrated in Figures 1 to 5 comprises a frame structure composed of spaced triangular trusses H and I2 connected togetherby suitable cross beams including top cross beam l3, a removable cross beam' l4 at the rear and an intermediate cross beam 15 between the beams I 3 and I4. Additional cross beams may be provided at the front or at any other suitable points to increase the rigidity oflthe frame structure.

The base of the trusses Il'and l2 isprovided means there may be substituted for the ground wheels other ground supporting units at the rear of the frame and which may, in addition to a ground supporting-function, be effective for other purposes such as packing, harrowing, and so forth. The unit 21, illustrated in Figure 1, is a typical packer.

The movable unit carrying the subsoiler tool 28 comprises a pair of parallel beams 29 and 30 which project upwardly from either side of the subsoiler tool on the inside of the trusses I! and I 2. A cross bar 3! is secured across the top of the beams 29 and 30 and the ends of the cross bar are pin-connected to the outer ends of piston rods 32 and .33 of hydraulic cylinders 34 and 35. The said cylinders at their opposite ends are pivotally connected to stub shafts 36 and 31 projecting outwardly from the sides of the trusses l l and I 2 substantially as shown. When the subsoiler tool is too wide to be supported solely by end beams 29 and 30, one or more intermediate beams, such as the beam 311' may be added to the movable unit;

' The beams 29 and 33 are held between pairs of V-shaped struts 33, 38 and 39, 39, respectively secured between the cross bars l3 and I5. Each pair of struts provides a slideway for its corresponding beam disposed therebetween, as shown. Each beam 29 and 30 is provided with a longitudinal slot 40 and 4!, respectively. Said slots may be formed by U shaped bars 42 and 43 secured to the backs of the beams or formed integral therewith, substantially as shown.

Rollers 44 and 45 are disposed in the slots 40 and 4|, respectively, between the struts'to which they are rotatably secured near the apex of the with forwardly converging extensions I 6 and i1 .5;

struts. Rollers 46 and 41 are also disposed between the struts at the rear thereof which act as abutment supports for the back of thebars 42 and43 when the beams 29- and 3!! are in osition as shown'inFigure 3.

the extreme forward position: of the upper ends of the beams 29 and 33 can be changed within the throw limits of the said cams.

, The beams 29 and 30, at their upper ends, are each provided with a forwardly thickened portion 10 having a tapered bottom to ride over cam 59, presented as an onset member for the purpose of forcing the subsoiler tool into a normal operating plane afterit has penetrated to a given depth in the soil, say 4 or. 5 inches. This ar-- rangement permits the subsoiler tool to go down quickly through surface trash and root growth and prevents clogging thereof.

' The cross barzi is provided with bosses 54 and 55 which carry abutment screws 56 and 51. The lowerends of said screws'areadapted to contact the top of the cross beam [3 when the movable unit isin its operating position. See Figure 5. Said screws are provided with cranks 58' and 59 to-facilitate changing their positions on the cross bar 31 and hence to change the depth of operation of the subsoiler tool 28.

Movement of the subsoiler unit is effected by means of the hydraulic cylinders 34 and 35 connected to the usual control means (not shown) throughhydraulic cables 6!), 5i and $2, 63. In the position shown in Figure- 3, the subsoiler tool 28' is out of operating position above the ground level, hydraulic pressure being applied through the bottom cables Ell and 62 to force outwardly the pistonrods- 32 and 33.

To move the subsoiler into operative position hydraulic pressure is applied to the cylinders through the upper cables 61 and 63 to retract the piston rods 32 and 33. From the position shown in Figure 3, the effect of this action is first to cause the beams 29 and 33 topivot' about of the cross bar [3 as shown in Figure 5. The

depth of operation of the subsoiler tool 28 can therefore be adjusted by means of said screws 56 and: 51.

In Figure 6,, the modification comprises sub,- stituting for the enlarged portion. If! a separate offset member 64, one for each of the beams. 29 and 39 secured to the beam by means. of countersunk' bolts 65. This arrangement permits the member B l to be removable, if its useisnot needed in any particular case.

In Figure '7, the offset member 66 is welded to the beam. In each case. the offset-member may beslightly tapered throughout its length to com.- pensate for any spring in the beams-or subsoiler tool at extreme operating depths.

A further modification is also shownin Figure 7 inv which a roller. 61 is substitutedfor the cam 49. The roller ismounted on. a shaft 68 carried in longitudinal slots 69 of the arms of the struts 39, means being provided to secure the roller shaft in different positions in the slot.

I claim:

; ;1.1A. subsoiler; comprising, a: frame structure formed by a pair of spaced triangular trussessea 4 cured together with cross beams at the top and bottom, a unitv having a subsoiler tool at the bottom. and. arms extending, upwardly therefrom between said trusses, said arms having longitudinal slots, rollers on said frame engaging said slots, hydraulic cylinders between the upper ends of said arms and the frame, abutments on the frame forward of the arms for limiting the forward angular position of said arms about said rollers; and anzoifset member carried on the upper portion of the forward side of said arms for engaging said abutments and thereby tipping the upper portion of the arms rearwardly when the subsoiler tool descends to a predetermined depth below the frame.

2; A subsoiler comprising a frame structure, a unit mounted on the" frame structure having a subsoiler tool at the bottom and an arm extending upwardly therefrom, a roller carried by the frame engaging the rearward side of said arm, a hydraulic cylinder between the upper end of the said arm and the frame, an abutment on the frame forward of the arm for limiting the forward angular position of said arm relative to said roller, and an offset member carried on the upper portion of the forward side of'said arm for engaging said abutment and thereby tipping the upper portion of the arm rearwardly when the subsoiler tool descends to a predetermined depth below the frame.

3. A subsoiler as defined by claim 2 in which the offset member is removable.

4. A subsoiler comprising'a frame structure, a unit mounted on the frame structure having a subsoiler tool at the bottom and an arm extending upwardly therefrom, a roller carried by the frame engaging the'r'earward side of said arm, a hydraulic cylinder between the upper end of the said arm and the frame; an abutment on the frame forward of the arm for limiting the forward angular position of said arm relative to saidroller, said abutment being adjustable on the frame relative tothe' arm, and an offset member carried on the upper portion of the forward side of said arm for engaging said abutment and thereby tipping the upper portion of the arm rearwardly when the subsoiler tool de-- scends to a predetermined depth below the frame.

5. A subsoiler comprising a frame structure, a unit mounted on the frame structure having a subsoiler tool at the bottom and an arm extending upwardly therefrom, a roller carried by the frame engaging the rearward side of said arm,

a hydraulic cylinder between the upper end of the said arm and the frame, an abutment on the frame" forward of the arm for limiting the forward angular position of said armrelative. to

; said roller; an offset member carried on the References Cited in the file of this patent UNITED STATES PATENTS Number Name: Date 22!);877 Sherman; .Oct'. 21, 1879 1,018,252 McLaren: Feb; 20, 1912 1,904,666 Sack April 18,1933

2,411,072: Washburn; Nov. 12, I946 

